/* Question Banks Page Specific Styles */

/* Modern Hero Section */
.qb-hero {
    background: var(--darker-bg);
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}

.qb-hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
    filter: blur(60px);
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
}

.back-link-modern {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 40px;
    padding: 10px 18px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.back-link-modern:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    transform: translateX(-4px);
    border-color: rgba(255, 255, 255, 0.15);
}

.qb-hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.qb-icon-main {
    width: 100px;
    height: 100px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(118, 75, 162, 0.15));
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
}

.qb-hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.qb-hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 12px;
    line-height: 1.6;
}

.qb-attribution-modern {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.qb-attribution-modern strong {
    color: var(--text-secondary);
    font-weight: 600;
}

.qb-hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.btn-hero {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-hero-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
}

.btn-hero-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.btn-hero-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-hero-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.qb-stats-modern {
    display: flex;
    gap: 48px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat-modern {
    display: flex;
    align-items: center;
    gap: 14px;
}

.stat-modern svg {
    color: #667eea;
    flex-shrink: 0;
}

.stat-modern-info {
    text-align: left;
}

.stat-modern-number {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-modern-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

/* Header Section - OLD (keeping for backward compatibility) */
.qb-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 0 80px;
    position: relative;
    overflow: hidden;
}

.qb-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none"/><path d="M0 0L100 100M100 0L0 100" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></svg>');
    opacity: 0.3;
}

.back-link-dark {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    padding: 8px 16px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.back-link-dark:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: translateX(-4px);
}

.qb-header-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.qb-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    color: white;
}

.qb-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    color: white;
    letter-spacing: -0.02em;
}

.qb-description {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto 16px;
    line-height: 1.6;
}

.qb-attribution {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    font-weight: 500;
}

.qb-attribution strong {
    color: white;
    font-weight: 700;
}

.qb-quick-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

.quick-stat {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.1);
    padding: 16px 24px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-icon {
    font-size: 32px;
}

.stat-info {
    text-align: left;
}

.stat-number {
    font-size: 24px;
    font-weight: 700;
    color: white;
    line-height: 1;
}

.stat-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 4px;
}

/* Search Section */
.search-section {
    background: var(--dark-bg);
    padding: 40px 0;
    margin-top: -40px;
    position: relative;
    z-index: 2;
}

.search-box {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--card-bg);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 16px 24px;
    transition: all 0.3s ease;
}

.search-box:focus-within {
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.search-box svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 16px;
    font-family: 'Inter', sans-serif;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

/* Featured Section */
.featured-section {
    background: var(--dark-bg);
    padding: 60px 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.course-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 24px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.course-card:hover::before {
    transform: scaleX(1);
}

.course-card:hover {
    transform: translateY(-4px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.course-code {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.course-badge {
    padding: 4px 10px;
    background: rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    color: #667eea;
}

.course-name {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.4;
}

.course-meta {
    display: flex;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
}

.meta-item svg {
    width: 14px;
    height: 14px;
}

/* Loading State */
.loading-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-state p {
    color: var(--text-muted);
    font-size: 16px;
}

/* Departments Section */
.departments-section {
    background: var(--darker-bg);
    padding: 80px 0;
}

.departments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.department-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 32px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    position: relative;
    overflow: hidden;
}

.department-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.department-card:hover::before {
    transform: translateX(100%);
}

.department-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.dept-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    flex-shrink: 0;
}

.dept-content {
    flex: 1;
}

.dept-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.3;
}

.dept-code {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-weight: 500;
}

.dept-stats {
    display: flex;
    gap: 16px;
}

.dept-stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

.dept-stat svg {
    color: var(--text-muted);
}

.dept-arrow {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.department-card:hover .dept-arrow {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(4px);
}

.department-card-browse-all {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-color: rgba(102, 126, 234, 0.3);
    grid-column: 1 / -1;
    justify-content: center;
    text-align: center;
}

.department-card-browse-all .dept-content {
    flex: none;
}

/* How to Use Section */
.how-to-section {
    background: var(--dark-bg);
    padding: 80px 0;
}

.how-to-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.how-to-card {
    text-align: center;
    padding: 32px 24px;
}

.how-to-number {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    color: white;
}

.how-to-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.how-to-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Contribute Banner */
.contribute-banner {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 24px;
    padding: 40px;
    display: flex;
    gap: 24px;
    align-items: center;
    flex-wrap: wrap;
}

.contribute-icon {
    flex-shrink: 0;
    color: #667eea;
}

.contribute-icon svg {
    display: block;
}

.contribute-content {
    flex: 1;
    min-width: 250px;
}

.contribute-content h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.contribute-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Responsive Design */

/* Large tablets and small desktops */
@media (max-width: 1024px) {
    .qb-container {
        padding: 0 2rem;
    }
    
    .featured-courses {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .how-to-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

/* Tablets */
@media (max-width: 768px) {
    .qb-container {
        padding: 0 1.5rem;
    }
    
    .qb-hero {
        padding: 60px 0 80px;
    }
    
    .qb-icon-main {
        width: 80px;
        height: 80px;
    }
    
    .qb-icon-main svg {
        width: 48px;
        height: 48px;
    }
    
    .qb-hero-title {
        font-size: 36px;
        line-height: 1.2;
    }
    
    .qb-hero-description {
        font-size: 16px;
        max-width: 100%;
    }
    
    .qb-hero-actions {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }
    
    .btn-hero {
        width: 100%;
        justify-content: center;
        padding: 14px 24px;
    }
    
    .qb-stats-modern {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-modern {
        gap: 10px;
    }
    
    .stat-modern svg {
        width: 20px;
        height: 20px;
    }
    
    .stat-modern-number {
        font-size: 24px;
    }
    
    .qb-section {
        padding: 60px 0;
    }
    
    .qb-title {
        font-size: 36px;
    }
    
    .qb-subtitle {
        font-size: 16px;
    }
    
    .search-container {
        max-width: 100%;
    }
    
    .featured-courses {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .course-card {
        padding: 24px;
    }
    
    .how-to-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .how-to-step {
        padding: 24px;
    }
    
    .contribute-banner {
        padding: 40px 24px;
        text-align: center;
        justify-content: center;
        gap: 24px;
    }
    
    .contribute-icon {
        width: 100%;
        margin-bottom: 0;
    }
    
    .contribute-content {
        text-align: center;
    }
}

/* Mobile devices */
@media (max-width: 480px) {
    .qb-container {
        padding: 0 1rem;
    }
    
    .qb-hero {
        padding: 40px 0 60px;
    }
    
    .qb-icon-main {
        width: 70px;
        height: 70px;
    }
    
    .qb-icon-main svg {
        width: 40px;
        height: 40px;
    }
    
    .qb-hero-title {
        font-size: 28px;
    }
    
    .qb-hero-description {
        font-size: 15px;
    }
    
    .btn-hero {
        padding: 12px 20px;
        font-size: 14px;
    }
    
    .qb-stats-modern {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stat-modern {
        flex-direction: row;
        justify-content: center;
        text-align: left;
    }
    
    .qb-section {
        padding: 40px 0;
    }
    
    .qb-title {
        font-size: 28px;
    }
    
    .qb-subtitle {
        font-size: 15px;
    }
    
    .search-box {
        padding: 14px 20px 14px 48px;
        font-size: 15px;
    }
    
    .search-icon {
        width: 18px;
        height: 18px;
        left: 16px;
    }
    
    .course-card {
        padding: 20px;
    }
    
    .course-code {
        font-size: 18px;
    }
    
    .course-name {
        font-size: 14px;
    }
    
    .course-icon {
        width: 36px;
        height: 36px;
    }
    
    .course-icon svg {
        width: 18px;
        height: 18px;
    }
    
    .how-to-step {
        padding: 20px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .step-title {
        font-size: 18px;
    }
    
    .step-description {
        font-size: 14px;
    }
    
    .contribute-banner {
        padding: 32px 20px;
    }
    
    .contribute-title {
        font-size: 20px;
    }
}

/* Small mobile devices */
@media (max-width: 360px) {
    .qb-container {
        padding: 0 0.75rem;
    }
    
    .qb-hero-title {
        font-size: 24px;
    }
    
    .qb-hero-description {
        font-size: 14px;
    }
    
    .btn-hero {
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .qb-title {
        font-size: 24px;
    }
    
    .course-card {
        padding: 16px;
    }
    
    .how-to-step {
        padding: 16px;
    }
}

/* Landscape orientation for mobile devices */
@media (max-height: 600px) and (orientation: landscape) {
    .qb-hero {
        padding: 40px 0 50px;
    }
    
    .qb-icon-main {
        width: 60px;
        height: 60px;
    }
    
    .qb-icon-main svg {
        width: 32px;
        height: 32px;
    }
    
    .qb-stats-modern {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .qb-section {
        padding: 40px 0;
    }
}